Valve spring compressor



March 31, 1925.

P. JOHNSON VALVE SPRING COMPRESSOR Filed April 24, 1924 I" III m n m d W a ATTORNEY "of Missouri, have invented spring under compression, the same in such' pos1t1on,

Patented Mar. 31, 1.9225.

U TEP TM m e rEnaY JOH S N; or maven, ivnssovnr VALVE srnine oonr nnssoa.

- Appl cation filed, April 2 924. ,fiefial No. 708,770.

1 1' T 0 all whom it may concern:

Be it known that I, PERRY JOHNSON, a citizen of the United States, residing at Boonville, in the county ofCooper and State new and useful Improvements in Valve Spring Compressors, of which the following is a specification.

This invention relates to valve spring V compressors. 10

factured, being constructed of few parts,

and is strong and durable and easily placed in position to holdthe valve proper, engage the usualwasher atthe-end of the spring, especially in the valve-in-head type of motors, said valve-engaging member being roughly adjustable to i adapt the same to different sizes, an'd by the simple manipulation of a single "operating lever compress the spring to free the cotter key, and by a further movement of said lever, lock the parts in this position.

A full and complete understanding of the invention may be obtained froma consideration of the following detailed description, i

gated shank or body member 1 formed of v a'steel bar, preferably rectangular in cross section and having one end,,const1tuting the taken in connectionwith the accompanying drawing forming a part of this'specification, it'be-ing understood that while the drawing shows a'practical form of the'invention, the

latter is not to be contined to strict conforinity with the showing thereof, but may be changed or modified, so long as such changes or modifications mark no material departure from the-salient features of the invention,asspecifically' pointed out in the appended claims.

In the drawmg, 1nwhich similar reference characters designate corresponding parts throughout the several figures:-

Figure 1 is a side elevation of the device shown inoonnection with a motor valve.

Figure 2 is a front elevation of the same. Figure 3 is'a top plan view thereof.

' Figureais a detail plan view of the ad justable abutment. l j

Figure 5 is a detail perspective view of the same.

In that class of motors in which the inlet and exhaust valves are actuated by tappet arms, great difliculty is encountered inrer moving the cotter pins or keys from the valve stems, when it is desired to removethe valves for the purpose of grinding the same or the valve seats. The springs surroundmg the valve stems and whlch serve the purpose of returning the valves to their seats upon the return stroke noflsaid tappet arms, are necessarily placed under such ten sion as to render very difficult the removal of said keys which hold the washers abutting one end of the springs, and while tools or devices for such purposehaVeLbeen de signed andused, many of them provide no means-for locking the same when the spring is compressed, and thus permit the use of only one hand of the operator for removing the key. i

The present invention is designe'dfto overlcome these difficulties, by the provision of means for easily and quickly applying the device in pos1t1on to engage the lower face of the valve proper and the upper face of the washer on the valve stem against which the spring bears, and, by the action of one hand, to force the washer. and the spring away from the cotter key and to lock the samein spaced relation thereto, so that both hands maybe used for removing said key, thus effecting a great saving of time and labor. i

In the drawing there is shownan elonupper end, bent at substantially right angles to provide a supporting arm 2, the length of said. supporting arm being substantially one-third thelength of the shank 1.

At the outer, free end, the supporting arm 2 is bifurcated to provide a fork 3, for a purpose to be explained, and at the oppos site or lower end, the shank is provided with a series of notches defining teeth 4; having lower sides which, are inclined inwardly and downwardly and upper sides perpendicular to the longitudinal axis of the shank. a

Adjacent to the bend between the shank 1 and the arm 2, the said shank is provided with a transverse aperture 5 for-the pivotal connection of a presser foot 6, which is "constructed of similar metal somewhat thi-nner than the shank and arm, andhas its side portions turned up to form stiffening flanges, which are extended at one end beyondthe joining portion to provide projecting arms 7.

At the other or outer -end,the presser foot 6 is provided with a widened portion, preferably rounded on its outer edges to constitute a head 8, having anopen ended slot 9 therein for straddling a cotter key and permitting the entrance of a valve stem, in a manner to be explained. That portion ofthe .presser "foot between the upstanding flanges is slightly depressedto form a seat orgroove 10,-and the'outer free'ends of the arms 7 are spacedapart a distance to freely admit the shank therebetween, and have suitable-alined apertures registering with theaperture *5 ofthe shankto which the presserlfoot is pivotally secured bya rivet 11, passing through the aforesaid alined openings to permit thesa'i-d'presse'r'foot to swing upwardly and -downward-1y. v

11 operating lever 12 similar to but somewhatsm'aller in cross section than the shank 1,'is .provided at "one end with airi'ghtangular bendto provide'an:actuating "arm 13,-an d the latter is'provided near said bend "with'a suitable aperture'to aline with sinr ilarapertures through the arms ofathe fork 3, for the reception ofa rivet llywhich pivotal-1y connectsthe said operating lever to the supporting arm 2, with the actuating a'rm'13 extending through Lthe bifurcation and depending below'the same, the lower end'o'f saidarm 13 being square and bearing in "the aforesaid groove 10 7 of the 'presser foot' 6. A retra'ctile spring 15 connects the presser foot, at an 'inteiunediate point, to the overhanging supporting arm 2,'and when the operating lever 12 is forced downwardly'to lieparallel to "and upon the supporting arm'2, asindicated in Figure '1 'ofthe drawing, the actuating arm 14: forces thc presser foot downwardly, thus stretching the spring 15, and as said arm 13 passes the center, the squared end 'thereof''rests"flat upon theggroove and the presser foot is locked in: depressed position, the -1'e't1actile 'force of the spring being unable to return the presser toot until the lever l2 is rocked upwardly again, as shown indotted lines inFi'gnre 1.

AU-shaped steel clip 16 surrounds'the shank 1 on'three sides, the open side of the clipbeingon that side edge of the shank having the teeth 1,- and the arms of thejclip are -extended 'to provide ears 17 between which EI-iStBGl abutment member '18 is rockably mounted; the said member 18 having at its outer end, an upstanding arm 19 pm vided with a rOundedheadQO, which may have aflat upper face or the same may be concave. At the inner endtthe meniber 18 is directed downwardly and formed into a dog 21,-the tip of which is directed inwardly and downwardlyto conform to and engage with the recesses defining the teeth 4, the an'glelportion of the member 18 where joined to the dog 21 being provided with an apertureto-aline with similar apertures in the said ears 17, and through which a pivot pin 22 is passedto permit the abutrnent -member18 to be adj usted with" respect t'othe shank. i yraising the/free end otthemember18, thedog is disengaged from the tooth and the member may be moved upwardly or downwardly upon'the shank *1.

In using'the device, the adjustable abutment member 18- ismoved alo'ng'the shank to the proper position to suit the valve to be removedyand the dog en'gaged in the proper 'toothfor the purpose. The head '20 isthen 'placedagainst the underface of the valve '23 and, with the lever raised, as in'dotted lines of Figure 1, the presser foot 8 is ap plicdto theuppcr portion of the valve stem 24: which passes into the bifurcation 9, and 'saidpresser foot ispressed dowi'iwardly'by the lever12- to bean-upon the usual washer '25. The width and-length of the bi'furca- 'tion issutficientto allow -tl e cotter pin or key 26 to freely pass'throu-gh the same during such movement, and as pressure is brought to bear on the lever lathe said washer is forced '-clovvn\'vardly against the pressure'ofthe val'vespring'27, which is thus compressedsufiiciently to entirely free or expose the cotter pin or key, and as 'the arm i13pass'es the center, it looks the 'presser foot down under the a combined j pressure of the spring 27 and the'spring15, so'that both handset" the operator may be employed for driving the-cotter pin from its-seat'in the valve stem.

From-theforegoingit will be seen that a simple, cheaply maunfactured, and easily 'op'erate'd device has been provided for the 'removalof cotterpins-or keys from valve stems, toperm it'the valves and their seats to be ground, and that-the-device may be employed with equal con venience and ease fol-the assembling of the-parts of the valve structure again after grinding.

valve spring compressor con'iprising a shank angularly bent atone end to forma supporting arm, a presser foot pivoted at one end to the shank adjacent the bend thereof and extending in the direction-of the supporting arm, said presser foot having a slot in itsfree-endto receive a valve stem, a retractile spring connecting the presser foot to thesupporting arm, an operating lever'coniprising a long arm constituting a handle and an angularly bent short arm and pivotedat'its'angle to the end, of-the supporting arm, saidshort arm bearing .at its free end upon the presser foot, and an ad- 'ustable abutment mounted on the shank to ear against a valve in opposition to the V presser foot.

end to the shank adjacent to the bend there of and extending in the same direction as the supporting arm but beyond the same, said presser foot having a longitudinal groove or seat intermediate its ends and having its free end widened and longitudinally slotted to receive a valve stem, a coiled spring connected at one end to an intermediate point of the presser foot and at the other end to the supporting arm, an operating lever angularly bent at one end to form an actuating arm, said lever being pivoted adjacent to its angle inthe bifurcation of the supporting arm, with the free end of the actuating arm bearing in the groove or seat of the presser foot and adapted to force the latter away from the supporting arm in opposition to the spring when the said lever is rocked, and an adjustable abutment carried by the other end of the shank to bear against the valve in opposition to the presser foot.

3. A valve spring compressor comprising an elongated shank having one end bent at a substantially right angle to provide a supporting arm, a presser foot pivoted at one end to the shank near the bend thereof and having at its other end means for engagement with a valve stem, a spring having a tendency to pull the free end of the presser foot towards the said arm, a lever having an angular actuating arm pivoted to the supporting arm and bearing on the presser foot, said lever, when depressed, resting upon the supporting arm and extending beyond the shank with the actuating arm locking the presser foot from movement towards the supporting arm. V

4. A valve spring compressor comprising an elongated shank having one end bent at a substantially right angle to provide a supporting arm, a presser foot pivoted at one end to the shank near the bend thereof and having at its other end means for engagement with a valve stem, a spring having. a tendency to pull the free end of the presser foot towards the said arm, a lever having an angular actuating arm pivoted to the supporting arm and bearing 011 the presser foot, said lever, when depressed, resting upon the supporting arm and extending beyond the shank with the actuating arm locking the presser foot from movement towards the supporting arm, said shank having teeth in its edge in line with the supporting bar, a clip surrounding three sides of the shank and projecting beyond the toothed edge, a lever pivoted to the projecting arms of the clip, said lever having an upstanding arm at its free end provided with a head to bear against the valve, and having a depending dog at the pivoted end to engage the teeth of the shank and resist the pressure of the presser foot. y

5. A valve spring compressor comprising a main bar having teeth in one edge adjacent 'one end, a supporting bar extending outwardly from the other end of the main bar, a presser foot pivoted at oneend to the main bar and adjacent to the supporting bar, said presser foot having a slot to straddle a cotter pin and receive a valve stem, an actuating lever having an arm bearing on the presser foot and pivoted to the supporting arm and adapted to force the foot downwardly, a spring connecting the foot and arm to oppose the lever, and an adjustable abutment comprising a head to bear against the valve, an arm extending from the head toward the shank and provided with a depending dog integrally joined thereto and having a nose shaped to engage the teeth of the shank, a clip slidably embracing the latter and having ears, and a pivot traversing the ears and the said arm above the dog to hold the abutment in opposition to the presser foot. a

-In testimony that I claim the foregoing as my own, I have hereto aflixed my signature.

PERI! JOHNSON. 

